T-DMB
T-DMB and T-DMBVR
Technology Overview
T-DMB and T-DMBVR are extensions of the DAB standard for the transmission of video to mobile receivers. This requires a special T-DMB A/V encoder. The RF coding and frequencies used are identical to those for DAB. Existing DAB and DAB+ transmitters can be used for T-DMB as well. Baseband coding differs from DAB and DAB+ in two aspects: 1) the multiprotocol encapsulation of MPEG-4 H.264-coded video and HE-AAC (BSAC in Korea) as MPEG-2 TS in ETI DAB baseband, and 2) the additional FEC and time interleaving with higher depth.
T-DMBVR is another way to provide pictures that may be related to the audio content using the T-DMB standard. The two T-DMB video parameters, i.e. frame repetition and video bit rate, are reduced in such a manner that a slide show is displayed on the radio receiver’s graphical display. This means that a completely new application for information and advertising is now available for radio service providers.
Standardization
The T-DMB and T-DMBVR standards were designed in Korea and adopted in Europe by ETSI TS 102 247 and TS 102 248.
The World DMB Forum is responsible for maintaining and updating the DAB and T-DMB standards.
